--- include/libbb.h	2012-04-21 21:33:23.000000000 -0400
+++ include/libbb.h.new	2022-04-29 20:49:40.674509941 -0400
@@ -40,6 +40,7 @@
 #include <sys/poll.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
+#include <sys/resource.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/time.h>